Eddie Howe suddenly has a lot of decisions to make ahead of Newcastle United’s game against Arsenal. The Magpies’ 2-0 win over Chelsea has changed the mood on Tyneside. After weeks of doom and gloom, optimism has returned. St James’ Park was loud and proud on Wednesday night, as Eddie Howe’s side produced the type of performance that they have always been capable of during this difficult run. The Newcastle United manager tweaked his team against Chelsea, with Howe making five changes to his starting lineup. Howe also used Sandro Tonali in a different role, and it proved to be a masterstroke. O…